Start by making cuts into the tomato and stuff the peeled garlic into the slits, now roast them on your gas stove till the skin turns black.
Peel out the skin and then puree the whole tomato and garlic to a paste. You will now have a lovely smoky tomato and garlic paste.
Add some ghee to a pan then add the whole spices, cumin seeds, onion seeds, ginger garlic ,whole red chili and the sesame seeds till light brown.
You can add water if you want more gravy at this stage.